Photographic element comprising polyurethane film support

ABSTRACT

A composition of matter comprising a polymer having the structure:   D R A W I N G N IS A MOLE FRACTION AND IS A POSITIVE NUMBER LESS THAN OR EQUAL TO 1; M IS A MOLE FRACTION AND EQUALS 1-N; R1 and R3 are independently selected from the group consisting of hydrogen and alkyl radicals of from one to six carbon atoms; R2 is an alkyl radical of from one to six carbon atoms; R4, R5, R6 and R7 are independently selected from the group consisting of hydrogen, aryl radicals, halogen atoms, nitro radicals, cyano radicals, amino radicals and alkoxy radicals; R8, R9 and R10 are independently selected aliphatic or aromatic radicals; J is an integer and equal to zero or one; AND -X-A-X- and -X1-R8-X1- and J     WHEREIN: A is

nited States Patent n 1 Wilson et al.

[ Mar. 25, 1975 PHOTOGRAPHIC ELEMENT COMPRISING POLYURETHANE FILM SUPPORT [75] Inventors: John Wilson; Frederick T. Hamb,

both of Rochester, NY.

[73] Assignee: Eastman Kodak Company,

Rochester, NY.

[22] Filed: Mar. 22, 1974 [21] Appl. No.: 453,745

Related U.S. Application Data [62] Division of Ser. No 345,623, March 28, 1 973, No. 3.842.042, which is a division of Ser. No.

194,506, Nov 1, I971, Put. N0. 3,769,264.

[52] U.S. Cl. 96/87 R, 96/75 [51] Int. Cl .l G036 1/78 [58] Field of Search 96/87 R, 75

[56] References Cited UNITED STATES PATENTS 3.085.993 4/1963 Peter ct al. 260/775 AP 3.640965 2/1972 Brode et al. .t 260/775 AP 3.803096 4/1974 Wilson .1 96/87 R Primary Examiner-Ronald H. Smith Attorney, Agent, or Firm-A. H. Rosenstein [57] ABSTRACT A composition of matter comprising a polymer having the structure:

A x (an) R9 (Ni-Mil 11 Q 4 r I 1-3 :11 (Ndl R' -{mn j m L wherein:

Ais

radicals and alkoxy radicals;

R", R and R are independently selected aliphatic or aromatic radicals;

J is an integer and equal to zero or one;

and X-AX' and X R-X and J are interdependently related according to the following schedule:

5 Claims, No Drawings PHOTOGRAPHIC ELEMENT COMPRISING POLYURETHANE FILM SUPPORT This is a division of application Ser. No. 345,623,

filed Mar. 28, 1973, now U.S. Pat. No. 3,842,042,

which is a division of application Ser. No. 194,506, now U.S. Pat. No. 3,769,264.

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to polymers containing substituted and unsubstituted 3-(4-cyclohexylene)hexahydroindan-5-yl units and to the preparation of these polymers.

2. Description of the Prior Art There is a continuing demand for low cost filmforming materials with improved physical properties which can be used as supports for photographic elements. Many of the currently available film-forming compositions that exhibit good physical characteristics are commercially unattractive owing to the costof the component ingredients or the difficulty of the manufacturing conditions.

The compound 1,l,3-trimethyl-5-carboxy-3-(4- carboxyphenyl)indan is a commercially available material, generally referred to as phenylindan dicarboxylic acid or, abbreviated, PIDA. Means for the preparation of PlDA have been disclosed by Petropoulous in, for example, U.S. Pat. Nos. 2,780,609; 2,830,966, 2,873,262 and 3,102,135. U.S. Pat. No. 2,780,609 describes the use of PIDA as a plasticizer for vinyl chloride polymers. U.S. Pat. No. 2,830,966 relates to polyester resin compositions comprising an unsaturated polyester resin and a polymerizible compound containing a vinylidene group, wherein the polyester resin is prepared by reacting a polyhydric alcohol with an alpha, beta-unsaturated polycarboxylic acid and PIDA. U.S. Pat. No. 2,873,262 relates to a process for prepar-- l-X A -X (NH) R (NH ing alkyd resins comprising reacting a polyhydric alcohol with PIDA. US, Pat. No. 3,102,135 describes a Diisocyanatoindans and diisothiocyanatoindans and polymers prepared therefrom are described in U.S. Pat. Nos. 2,855,385 and 2,855,420.

U.S. Pat. No. 3,539,619 to Steitz describes 1,1,3- trimethyl 3-cyclohexylindane-4',5-dicarboxylic acid, its acid chloride and its lower alkyl esters. The patent states that this acid has utility in the preparation of polyamides and polyesters.

SUMMARY OF THE INVENTION In accordance with the present invention, a Composition of matter is provided comprising a polymer having "the structure:

n is a mole fraction and is a positive number less than or equal to l;

m is a mole fraction and equals l-n;

R and R are independently selected from the group consisting of hydrogen and alkyl radicals of from one to six carbon atoms;

R is an alkyl radical of from one to six carbon atoms;

R, R R and R are independently selected from the group consisting of hydrogen, aryl radicals, halogen atoms, nitro radicals, cyano radicals, amino radicals and alkoxy radicals;

R", R and R are independently selected aliphatic aromatic radicals;

J is an integer and equal to zero or one;

and X-AX and -X'RX and J are interdependently related according to the following schedule:

process for the preparation of PIDA.

Copolyesters of PIDA with terephthalic acid and ethylene glycol have been described in Belgian Pat. No.

The polymers are useful in the manufacture of fibers, lacquers, adhesives, molding resins, sheets, engineering plastics or subbing layers. In particular, these polymers 731,258 and Netherlands Pat. No. 69,05 547 and its reare useful as photographic film supports.

action with bisphenols has been described by Hamb in Belgian Pat. No. 748,510.

Preparation and uses for 1-(hydroxyphenyl)indanols are described in U.S. Pat. Nos. 2,754,285, 2,819,249 and 2,979,534.

DESCRIPTION OF THE PREFERRED EMBODIMENTS As stated above, the novel polymers of this invention comprise the following structure:

wherein: A is These polymers are polyesters, polyurethanes or mixtures wherein both ester and urethane moieties are present in the same polymer chain.

As used herein, :1 is a mole fraction and is a positive number less than or equal to 1. Similarly. m is a mole fraction and is equal to ln. It is preferred that n have a value in the range of about 0.15 to about 1.0. R and R are each either hydrogen atoms or lower alkyl radicals of from one to six carbon atoms such as methyl, ethyl, propyl, butyl, pentyl, hexyl and isomers thereof. It is preferred that where R and R are alkyl radicals, they be methyl radicals. R is an alkyl radical of from one to six carbon atoms such as those described for R and R and is preferably a methyl radical.

R R, R and R are independently selected and can be hydrogen atoms, aryl radicals such as phenyl, naphthyl, anthryl, phenanthryl and the like, including substituted aryl radicals, halogen atoms, nitro radicals, amino radicals, cyano radicals, alkoxy radicals and the like, wherein the substituients on the substituted aryls are limited to the above radicals.

In the above structural formula, J is an integer which is either zero or one. lt will be understood, however, that for a given polymer chain, J can be equal to zero in one segment of the chain and equal to one in another segment. That is to say, when J equals zero, the resultant structure is a polyester; when J equals one, the structure is a polyurethane and where the polymer is a mixture of polyester and polyurethane units, J will be zero for the ester units and one for the urethane units. X and X are chosen from one of the combinations of the following schedule:

R", R and R are independently selected aliphatic or aromatic radicals. More specifically, R, R and R can be radicals selected from the group consistingof alkylene radicals of from 2 to 10 carbon atoms, such as ethylene, tetramethylene, pentamethylene, octamethylene,.nonamethylene and the like; arylene radicals, such as 0-, m-, or p-phenylene, naphthalenediyl, or anthracenediyl, unsubstituted or substituted with radicals such as halogen, nitro, cyano, alkyl of l to 6 carbon atoms or alkoxy of l to 6 carbon atoms; arylenebisalkylene radicals wherein the alkylene portion has 1 to 6 carbon atoms, such as phenylenedimethylene, phenylenediethylene, naphthalenediyldimethylene, naphthalenediyldiethylen and the like, cycloalkylene radicals, such as cyclopentylene, cyclohexylene, norbornanediyl; alkylenebisarylene radicals where the alkylene portion contains 1 to 12 carbon atoms, such as ethylene, trimethylene, hexamethylene, decamethylene, dodecamethylene, and the arylene portion is as dc fined above; alkylidenebisarylene radicals where the alkylidene portion contains 1 to 12 carbon atoms. such as ethylidene, allylidene, hexylidene and the like. and the arylene portion is as defined above; and arylenealkylene radicals where the arylene and alkylene portions are as defined above.

The radicals R", R and R can also be units having the formula:

wherein R", R R R, R R and R are independently selected from among those atoms and radicals described above as being suitable embodiments of R, R R R R R and R respectively.

R, R and R can also be represented by the formula:

wherein each R and R, which can be the same or dif ferent, is selected from the group consisting of hydrogen atoms, aryl radicals, such as phenyl, including substituted phenyl, halogen atoms, nitro radicals, amino radicals, cyano radicals, alkoxy radicals and the like, and wherein the substitutents on the phenyl radical may be a halogen atom, nitro radical, amino radical, cyano radical, or alkoxy radical. R and R" represent aliphatic monocyclic or bicyclic radicals or can each be hydrogen atoms, alkyl radicals of from 1 to 6 carbon atoms, including substituted alkyl radicals, such as fluoromethyl, difluoromethyl, trifluoromethyl, dichlorofluoromethyl, 2-[2,3,4,5-tetrahydro-2,2-dimethyl4- oxofur-3-yl1ethyl and the like; cycloalkyl radicals of from 4 to 6 carbon atoms, such as cyclohexyl; and aromatic radicals having from 6 to 20 carbon atoms, such as phenyl, 3,4-dichlorophenyl, 2,4-dichlorophenyl. R and R taken together with the carbon atom to which they are attached can represent a monocyclic, polycyclic, or heterocyclic moiety having from 4 to 15 atoms in the ring system.

The fundamental condensants from which the poly mers of this invention are prepared have the following structure:

and most preferred that Y and Z be identical and be either hydroxymethyl or carbomethoxy.

Where Y and Z are hydroxymethyl, they will generally be reacted with dicarboxylic acids or derivatives thereof.

Dicarboxylic acids which can be employed to advantage in preparing polyesters from the dihydroxymethyl compounds of this invention include succinic acid, glutaric acid, adipic acid, pimelic acid, azelaic acid, sebacic acid, 2-methyladipic acid, diglycolic acid, thiodiglycolic acid, fumaric acid, cyclohexane-l,3- dicarboxylic acid, cyclohexane-l,4-dicarboxylic acid, cyclopentane-l,3-dicarboxylic acid, 2,5-norbornanedicarboxylic acid, (the above-described acids being useful either as the cis or trans form), phthalic acid, isophthalic acid, terephthalic acid, tbutylisophthalic acid, phenylenediacetic acid, phenylenedipropionic acid, 2,6- naphthalenedicarboxylic acid, 1,4- naphthalenedicarboxylic acid, 1,5- naphthalenedicarboxylic acid. 1,7-

naphthalenedicarboxylic acid, 4,4-diphenic acid, 4,4- sulfonyldibenzoic acid, 4,4'-oxydibenzoic acid, binaphthyldicarboxylic acid, 4,4'stilbenedicarboxylic acid and 9,lO-triptycenedicarboxylic acid.

Although the dicarboxylic acids useful in the practice ofthis invention can be employed in the free acid form, it is often more advantageous to utilize a bifunctional derivative. For example, the corresponding acid anhydrides may be used where they are available. Other useful bifunctional equivalents include the lower monohydric alcohol or phenyl esters of dicarboxylic acids and the dicarboxylic acid halides, e.g., the chlorides or bromides.

Where the polyurethanes of this invention are to be prepared from the di-hydroxymethyl derivatives described above, this will generally be accomplished by reaction with diisocyanates. As exemplary of some of the diisocyanates which may be employed for this purpose may be listed: hexamethylene diisocyanate, methylenedi-p-phenyl diisocyanate, 3,3'-dimethoxy-4,4- biphenyl diisocyanate and tolylene-Z,4-diisocyanate and the like.

Where Y and Z of the above structural formula are COOH, carboxylic acid halide or COOR and the polyesters of this invention are the desired end product, these materials will generally be reacted with bisphenols, monocyclic and polycyclic diols and alkylene glycols. The bisphenols employed in this invention are generally of the structure:

wherein R', R, R and R are as defined hereinbe fore.

Typical useful bisphenols include: Bisphenol A; 2,2- bis(4-hydroxy-3,5-dichlorophenyl)propane[tetrachlo'robisphenol A]; l-phenyll l -bis(4- hydroxyphenyl)ethane; l-( 3,4-dichlorophenyl )-l l bis(4-hydroxyphenyl)ethane; 2,2-bis-(4 hydroxyphenyl)-4-[3-(2,3,4,5-tetrahydro-2,2- dimethyl-4-oxofuryl)lbutane; hydroxyphenyl)methane; 2,4-dichlorophenylbis(4- hydroxyphenyl)methane; l,l-bis(4-hydroxyphenyl)- cyclohexane; 1,1,1,3,3,3-hexafluoro 2,2-bis(4-hydroxyphenyl)-propane; diphenylbis(4- hydroxyphenyl)methane.

Other useful bisphenols include 1,4-naphthalenediol, 2,5-naphthalene diol, bis(4-hydroxy-2-methyl-3- propylphenyl)-methane, l,l-bis(2-ethyl-4-hydroxy-5- sec.-butylphenyl)ethane, 2,2-bis(4-hydroxyphenyl)- propane, 2,2-bis(4-hydroxy-2-methyl-5-tert.- butylphenyl)propane, l,l-bis(4-hydroxy-2-methyl-5- isooctylphenyl)isobutane, bis-(2-ethyl-4- hydroxyphenyl)-4,4-di-p-tolylmethane. Still other useful bisphenols are disclosed in U.S. Pat. No. 3,030,335 and Canadian Pat. No. 576,491.

Typical monocyclic diols include hydroquinone and hydroquinones substituted with alkyl groups of l to 15 carbon atoms, or halogen atoms, resorcinol, unsubstituted or substituted with lower alkyl groups or halogen bis(4- atoms, and the like, l,4-cyclohexanediol, l,4- cyclohexanedimethanol, l,4-cyclohexanediethanol, l,- 4-bis(2-hydroxyethoxy )cyclohexane, 1,4- benzenedimethanol, l,4-benzenediethanol and the like.

lllustrative examples of polyalicyclic diols include norbornylene glycol, decahydro-2,6- naphthalenedimethanol and the compounds listed in Table l of U.S. Pat. No. 3,317,466 under the heading of Bisphenols."

Exemplary alkylene glycols include ethylene glycol, diethylene glycol, triethylene glycol, l,2-propanediol, l,3-propanediol, l,4-butanedi0l, 2,3butanediol, l,5- pentanediol, l,6-hexanediol, l,7-heptanediol, l,8- octanediol, l,9-nonanediol, l,l0-decanediol, 1,12- dodecanediol, neopentyl glycol, 2,2,4-trimethyl-l,6- hexanediol, and 4-oxa-2,6-heptanediol.

The polyurethanes of this invention can also be prepared by reacting the bischloroformate derivatives of the diol with diamines. As exemplary of some of the di amines that may be employed to prepare these polyurethanes may be listed: l,4-butanediamine; l,4-cyclohexanebis(methylamine); 1,8-menthanediamine; 1,2- propanediamine; l,3-propanediamine and the like.

The molecular weight of the linear condensation polymers of this invention can vary over wide ranges; it has been found that polymershaving a molecular weight of at least about l0,000 are useful. Compounds having a molecular weight from about 30,000 to l00.000 are particularly desirable. The compounds of this invention are further characterized by their inherent viscosities. Generally. the subject film-forming polymers have an inherent viscosity of about 0.l to about 0.8 and the polymers preferred as supports for photographic elements have an inherent viscosity of about 0.5 to about 0.8. The inherent viscosities are measured at 25C in 1:1 (by wt.) phenol: chlorobenzene at a concentration of 0.25g of polymer per 100 ml.

of solution unless otherwise specified.

The glass transition temperatures of the polymers of this invention can be determined by differential scanning calorimetry as disclosed in The DSC Cell and Accessories Instruction Manual for the 900 Thermal Analyzer and Modules, sold be E. I. DuPont deNemours Instrument Products Division.

Film-forming" as used in this invention refers to a material which will provide a self-supporting film of the material when cast or extruded, for example, when cast in sheets of from 1 to 7 mils thickness.

It is appreciated, of course, that the physical properties of the broad class of polymers of this invention, such as, for example, the glass transition temperature (Tg), yield strength, break strength, Young's modulus and the like, can be varied over a wide range. Polymers with properties in a particular range can be easily obtained by judicious selection of appropriate monomeric components and suitable mixtures thereof. The proper choice andproportions of the monomeric components can be determined by test procedures well known to those skilled in the art of making condensation polymers.

As indicated in the general formula set out hereinabove, the linear condensation polymers of this invention include polyesters, polyurethanes and mixed polyester-polyurethanes. Generally, any procedure known in the art for making linear condensation polymers can be used in preparing the polymers of this invention. The following are examples of processes that may be utilized to produce the linear polymers of this invention.

a. The interfacial procedure can be utilized to make the polymers. for example, by reacting the diacid chlorides with bisphenols or converting the diols to the bischloroforinates and reacting them with diamines. The preferred timeof reaction is a function of all other variables and. as such. is governed by the viscosity desired for the polymer. Generally. the reaction can be monitored by sampling and thus the preferred polymerization time chosen. A variety of solvents may be employed to provide a broad range of temperatures and solubilities as desired. Suitable solvents include the chlorinated hydrocarbons such as, for example, chloroform, dichloroethane, propylene dichloride, dichlorobenzene and the like.

b. Polymers, according to this invention. can be prepared by a solution procedure whereby the reactants are placed in solution in the presence of a solvent, such as. for example, chlorobenzene and a suitable catalyst, e.g., dibutyl tin oxide.

e. The ester interchange procedure of synthesizing polymeric esters both by the melt process and the powder process can advantageously be used to make the polyesters of this invention, in particular, the powder process can be used advantageously when the first and the like. The treated material is separated from the solvent by any conventional procedure and put through the powder process. The melt process is advantageously conducted in the presence of a catalytic agent. Useful catalysts for the transesterification reactions include the carbonate, oxide, hydroxide, hydride and alkoxide of an alkali metal or an alkaline earth metal, a compound ofa Group lVA metal of the Periodic Table, e.g., titanium isopropoxide, organometallic halides and complex alkoxides such as NaHTi(OC H and the like.

The film-forming materials of this invention can be generally extruded or cast into flexible supports and used in various layer arrangements and structural combinations. Generally, the flexible supports prepared from the polymers of this invention are treated by any convenient method to improve the adhesion of superimposed coatings or layers. Useful procedures include subbing with conventional subbing agents for polymer supports, contacting with a chemical agent such as sulfuric acid, electron bombardment, and the like. The film-forming polymers of this invention are used to advantage as flexible supports for photographic silver halide and other light-sensitive systems as well as for multi-layer elements used in color photography and diffusion transfer processes.

The following examples are included for a further understanding of the invention. It should be understood that where equations are given, they represent the overall reaction described in the particular example without regard to possible mechanism.

EXAMPLE 1 Synthesis of l,1,3-Trimethyl-3-(4-carbomethoxycyclohexyl)-5 carbomethoxyhexahydroindan In a pressure reactor were placed l000g (2.84 mole) of l.l,3-trimethyl-3-( 4-carbomethoxyphenyl )-5-carbomethoxyindan, 7.0 liters of dioxane and 20g of palladium on carbon catalyst. The reactor was then charged with 2500 psi of hydrogen at room temperature. The mixture was heated to 250C over a -hour period. The reactor was cooled overnight. Fifty grams of additional palladium on carbon were added and the reactor was recharged with hydrogen to 2500 psi at room temperature and heated to 250C over a 55-hour period. The reactor was cooled again overnight, and the mixture was filtered. To the filtrate was added 50g of palladium on carbon catalyst. The reactor was charged with hydrogen to 2500 psi at room temperature and heated to 250C over a 55-hour period. The reaction mixture was cooled, filtered, and the filtrate was concentrated. Part of the residue (750g) was further reduced as shown in Example 2. The balance of the residue was then distilled through a Vigreaux column. Four cuts were taken during the distillation as shown below in Table l.

TABLE I Pot Head Pressure Volume Fraction Temperature (C) Temperature (C) (mm) ml) Copper Chromite HOCH r 5000 psi Fraction 3 gave the following:

Anal. Calcd. for C- H o z C. 72.49;

. .95; .Wt. 364.5 Found: C, 7 .3 7

If desired, the corresponding dicarboxylic acids. acid chlorides, amides and the like can be prepared from the compound of Example 1 by any of the methods wellknown to those skilled in the art. The dicarboxylic acid can also be prepared by the hydrogenation of 1.1.3- trimethyl-5-carboxy-3(4carboxyphenyl)indan in the EXAMPLE 2 Synthesis of l,1,3-Trimethyl-3-(4-hydroxymethylcyclohexyl)-5- hydroxymethylhexahydroindan 1 ,1,3-Trimethyl-3-(4-carbomethoxycyclohexyl)-5- I carbomethoxyhexahydroindan (750g from Example 1 crude), 800 ml of dioxane and 75g of copper chromite were charged with 2500 psi of hydrogen at room temperature. The temperature was raised to 200C and maintained for 40.7 hours. The mixture was cooled, filtered and concentrated. An infrared examination of the crude residue exhibited strong carbonyl absorption. This residue was therefore taken up in dioxane again and treated with 75g of copper chromite and 2500 psi of hydrogen (room temperature measurement). This mixture was heated for 12.7 hours at 250C and cooled. The mixture was filtered and concentrated. All but 31g was distilled through a six-inch Vigreaux column giving 214g of 1,1,3-trimethyl-3-(4- hydroxymethylcyclohexyl)-5-hydroxymethylhexahydroindan. bp=220C/0.10 mm. Nmr, infrared and mass spectral data were in agreement with the proposed structure. An elemental analysis gave the following results:

Anal. Calcd. for C H O C. 77.87; H, 11.76.

Found: C. 78.1 :H. 11.6

presence of palladium on carbon catalyst.

EXAMPLE 3 Polymerization of 1,1,3-Trimethyl-3-(4-carbomethoxycyclohexyl)-5- carbomethoxyhexahydroindan and Ethylene Glycol In a polymer flask equipped with a Vigreaux-Claissen adapter and nitrogen inlet tube were placed 27.5g (0.0755 mole) of 1,1,3-trimethyl-3-(4- carbomethoxycyclohexyl)-5-carbomethoxyhexahydroindan, 7.95 g (0.128 mole) of ethylene glycol and a catalytic amount of zinc acetate dihydrate and antimony (III) oxide. The mixture was heated at 245C for 1.6 hours with nitrogen bubbling. Five drops of titanium tetraisopropoxide was added and the mixture was heated at 245C for an additional 2.8 hours. At this time nitrogen addition was terminated, stirring was begun and the flask was placed under an -micron vacuum. The temperature was then gradually raised to 300C over a 1.2-hour period. The light amberpolymer was then cooled and isolated. It was soluble in methylene chloride and chloroform on standing for 64 hours at 25C. The inherent viscosity was measured in a 1:1 (weight) phenolzchlorobenzene solution at a concentration of 0.25g/l00 ml at 25C and found to be 0.23. The glass transition temperature (Tg) was determined at a heating rate of 10C/min. with a DuPont 900 Differential Scanning Calorimeter and found to be 91C.

3 Zn(Ac) '2H O ca 0 c Sb 0 r1 0m 3 2 @co ca nhOCH CH OH 3 ;4 n W l c-0-cH cH o.. 2n-1 C5 0}! EXAMPLE 4 EXAMPLE 6 Example 3 was repeated except that l,4- Polymerization of cyclohexanedimethanol was substituted for the ethylene glycol employed therein. The inherent viscosity of the polymer so formed was 0.34 and the glass transition temperature was 1 13C.

EXAMPLE 5 Polymerization of l.l.3-Trimeth vl-3-( 4-hydroxymethylcyclohexyl )-5- hydroxymethylhexahydroindan and Dimethyl Tcrephthalate In a 50 ml polymer flask equipped with a Vigreaux- Claissen adapter. and a nitrogen inlet tube were placed 15.4g (0.05 mole) of LI .3-trimethyl-3-(4- hydroxymethylcyclohexyl)-5-h)droxymethylhexahydroindan. 9.7g (0.05 mole) of dimethyl terephthalate and a catalytic amount of dibutyl tin oxide. Over a 2.3- hour period the mixture was heated with nitrogen bubbling from 220C to 276C. The inlet tube was removed and with stirring, the pressure was reduced to 0.10-0.40 mm. This pressure and stirring were maintained at 273C for 2.5 hours. The polymer was then isolated as a grey-amber material. The inherent viscosity and glass transition temperature were determined as in Example 3 and were found to be 0.33 and 144C, respectively. T-his polymer was also soluble in methylene chloride and chloroform.

1,1 ,3-Trimethyl-3-(4-hydroxymethylcyclohexyl )-5- hydroxymethylhexahydroindan, l,4-Cyclohexanedimenthanol and Dimethyl Terephthalate (0.25:0.75)

In a 200 ml polymer flask equipped with a Vigreaux- Claissen adapter and nitrogen inlet tube were placed 23.16g (0.075 mole) of l,l,3-trimethyl-3-(4- hydroxymethylcyclohexyl)-5-hydroxymethylhexahydroindan. 357g (0.248 mole) of 1.4- cyclohexanedimethanol. 582g (0.30 mole) ofdimethyl terephthalate and a catalytic amount of dibutyl tin oxide. With nitrogen bubbling, the mixture was heated from 220C to 258C over a 15-hour period. The gas inlet was then removed and the mixture was stirred while the pressure was reduced to 1.0-5.5 mm. This vacuum was maintained for 2.1 hours after which an amber polymer was isolated. The inherent viscosity was 0.52 and the Tg was 108C.

EXAMPLES 7 AND 8 Example 6 was repeated varying the fractions of reactants. The details are shown in Table ll. The product of Example 7 was insoluble in both methylene chloride and chloroform.

TABLE II CH I OH 5 a. H r O O 6 CI 3 3 n m '1 '1 r 1 Inherent Tg Exarnple (Mole Fraction in Feed) Viscositg C) EXAMPLE 9 Polymerization of 1,1,3-Trimethyl-3-(4-hydroxymethylcyclohexyl)-5- hydroxymethylhexahydroindan. Ethylene Glycol and Dimethyl Terephthalate 0.25:0.75

moved and, with stirring, a vacuum of 0.80 mm was ap plied for 1.8 hours while a temperature of 270C was maintained. An amber polymer was then isolated. The inherent viscosity was 0.51 and the Tg was 101C. This product partly dissolved and partly crystallized in methylene chloride. It was soluble in chloroform.

EXAMPLES AND 11 Example 9 was repeated varying the mole fractions of the reactants. The details are shown in Table 111. The product of Example 10 gelled and crystallized in methylene chloride and crystallized in chloroform.

TABLE III OCH . @155. 00H 0H 0gl.

- n n O tained for 18.5 hours. A clear, amorphous selfsupporting film resulted.

EXAMPLE 13 A strip of film from Example 12 was treated with an activated gas by the process of Example IV of Belgian Pat. No. 736,993 for about 5 seconds using nitrogen trioxide as both the activator and reactive gases. The strip was then coated with a conventional gelatin-silver halide emulsion, dried and subjected to the "Cellophane Tape Test." According to this test. the dry emulsion layer is scored in a cross-hatch pattern and a piece of cellophane tape is pressed firmly over the crosshatched area. The tape is then stripped quickly from the film. If the bond between the emulsion layer and the support is strong. the emulsion layer will not be removed by the tape. The system of this example passed this test.

EXAMPLE l4 Polymerization of 1,1,3-Trimethyl-3-(4-hydroxymethylcyclohexyl)-5- hydroxymethylhexahydroindan and Methylenedi-p-phenyl Diisocyanate A solution of 6.17g (0.02 mole) of 1,1,3-trimethyl-3- (4-hydroxymethylcyclohexyl)-5-hydroxymethylhexahydroindan, 5.00g' (0.02 mole) of methylenedi-pphenyl diisocyanate and a catalytic amount of dibutyl CH3 CH3 m n Inherent Tg Example (Mole Fraction in Feed.) Viscosity C) p 10 on; 0.65 0.60 89 l2 WWW m tin oxide in 1 25 ml of o-dichlorobenzene was heated at I A solution of 5.0g of the copolymer of Example 8 in ml of chloroform was prepared, filtered and concentrated to one-half volume. This dope was then cast onto a Teflon spray-coated glass plate at 25C. The temperature of the plate wasgradually raised to C over a 25-hour period and this 60C temperature was mainapproximately C for 1.67 hours. The polymer which formed precipitated from solution. The mixture was poured into 1500 m1 of methanol and the polymer was allowed to harden, whereupon it was isolated and dried in a vacuum oven. The inherent viscosity and the glass transition temperature were determined by the procedures of Example 3 and were found to be 0.37 and 97C, respectively.

'BLI SnO EXAMPLE 15 Example 14 was repeated except that tolylene-2,4- diisocyanate was substituted on an equimolar basis for the methylenedi-p-phenyl diisocyanate employed therein. The inherent viscosity of this polymer was 0.14 and the glass transition temperature was 147C.

Generally, the film-forming materials of this invention can be solvent-cast or melt-extruded into sheets or films as useful flexible supports which can be utilized in various layer arrangements and structural combinations. Generally, the flexible supports of this invention are treated by any convenient method to improve the adhesion of superimposed coatings or layers. Useful procedures include sub-coating with either aqueous subbing systems, such as latexes or with organic subbing systems comprising solvent-soluble polymers in aqueous or organic solvents or in solvent mixtures, contacting with a chemical agent, such as sulfuric acid. electron bombardment and'the like.

thetic polymeric compounds, such as dispersed vinyl compounds, such as in latex form and mixtures of gelatin and other synthetic polymeric compounds. The polymers of this invention find further use as supports for light-sensitive colloid layers such as are used in image transfer processes, in lithography, and the like. The dimensional stability of the subject polymers make them suitable as supports for photoresists such as those utilized in the preparation of printed circuits, and the like.

Polymeric compositions, according to this invention, are advantageously prepared by standard techniques using well-known industrial processes. The compounds employed in making the polymers of this invention are prepared from readily available, inexpensive materials. A further advantage of the polymers of this invention is that they may be readily formed into film using procedures consistent with commercially available equipment.

US. application Ser. No. 180.114 filed Sept. 13, 197l of Wilson discloses hydroxymethyl substituted phenylindans and polymers thereof and the preparation of these condensants and polymers.

The invention has been described in detail with particular reference to preferred embodiments thereof. but it will be understood that variations and modifications can be effected within the spirit and scope of the invention.

What is claimed is:

l. A photographic element comprising a photographic emulsion coated on a film of a polymer having the structure:

wherein:

n is a mole fraction and is a positive number less than or equal to l;

m is a mole fraction and equals l n;

R and R are independently selected from the group consisting of hydrogen and alkyl radicals. of from l to 6 carbon atoms;

R is an alkyl radical from 1 to 6 carbon atoms;

R, R R arid R are independently selected from the group consisting of hydrogen. aryl radicals. halogen atoms, nitro radicals, cyano radicals. amino radicals. and alkoxy radicals;

R", R and R are independently selected from the group consisting of alkylene radicals of from 2 to 10 carbon atoms. arylerie radicals ,ary lenebisalkylene radicals wherein the alkylene portion has 1 to 6 carbon atoms, cycloalkylene radicals, alkylenebisarylene radicals wherein the alkylene portion contains l to 12 carbon atoms, alkylidenebisarylene radicals wherein the alkylidene portion contains 1 to 12 carbon atoms, arylenealkylene radicals, units having the formula:

l R19 R21 R 9 wherein R' and R are independently selected from the group consisting of hydrogen atoms, aryl radicals, halogen atoms, nitro radicals, amino radicals, cyano radicals and alkoxy radicals, and R and R are independently selected from the group consisting of hydrogen atomsalkyl radicals of from 1 to 16 carbon atoms,

o -er 5. The photographic element of claim 1 wherein R" is:

l =l l UNITED STATES PA'IENT OFFICE CERTHHCATE(HFCORRETMNT PATENTNO. 3,873,320 OATH) i March 25, 1975 INVENTOMS)I John Wilson and Frederick L. Hamb It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below;

Front page, on line titled "Inventors", "Frederick T. Hamb" should read --Frederick L. Hamb-.

Column 6, line 1A, should read -A-.

Column 10, the portion of the formula should read as follows;

4 v Signed and Scaled this eighth Day of June1976 [SEAL] Anna RUTHC.MASON C.MARSHALLDANN Arresting Officer Commissioner ofParems and Trademarks 

1. A PHOTOGRAPHIC ELEMENT COMPRISING A PHOTOGRAPHIC EMULSION COATED ON A FILM OF A POLYMER HAVING THE STRUCTURE:
 2. The photographic element of claim 1 wherein R1, R2 and R3 are methyl.
 3. The photographic element of claim 1 wherein R4, R5, R6 and R7 are hydrogen.
 4. The photographic element of claim 1 wherein R9 is:
 5. The photographic element of claim 1 wherein R9 is: 